As a form of personal protective equipment, high-visibility clothing is worn to increase a person's visibility and therefore prevent accidents caused by persons not being seen. As a result, it is often worn in occupations where hazardous situations are created by moving vehicles or low lighting conditions.
Why wear a reflective jacket at night?
Reflective vests are generally designed with a combination of bright colors and reflective sections so that visibility is maximized no matter what kind of light is outside. Along with helping other people notice workers and reflective vests, they can also help workers to keep track of each other in the dark.